diff --git a/src/compiler/checker.ts b/src/compiler/checker.ts
index 8eb834c63a4..732acf1843b 100644
--- a/src/compiler/checker.ts
+++ b/src/compiler/checker.ts
@@ -5996,7 +5996,7 @@ module ts {
             }
             else {
                 // Ordinary case - simple function invocation.
-                return (<CallExpression>callExpression).typeArguments;
+                return callExpression.typeArguments;
             }
         }